Civil Engineering Archives

2421. In actual machines______________?

A. mechanical advantage is greater than velocity ratio

B. mechanical advantage is equal to velocity ratio

C. mechanical advantage is less than velocity ratio

D. mechanical advantage is unity

✅ The correct answer is option C.

2422. Center of gravity of a thin hollow cone lies on the axis at a height of________________?

A. one-fourth of the total height above base

B. one-third of the total height above base

C. one-half of the total height above base

D. three-eighth of the total height above the base

✅ The correct answer is option B.

2423. If a suspended body is struck at the centre of percussion, then the pressure on die axis passing through the point of suspension will be___________________?

A. maximum

B. minimum

C. zero

D. infinity

✅ The correct answer is option C.

2424. A body moves, from rest with a constant acceleration of 5 m per sec. The distance covered in 5 sec is most nearly________________?

A. 38 m

B. 62.5 m

C. 96 m

D. 124 m

✅ The correct answer is option B.

2425. According to law of triangle of forces______________?

A. three forces acting at a point will be in equilibrium

B. three forces acting at a point can be represented by a triangle, each side being proportional to force

C. if three forces acting upon a patticle are represented in magnitude and direction by the sides of a triangle, taken in order, they will be in equilibrium

D. if three forces acting at a point are in equilibrium, each force is proportional to the sine of the angle between the other two

✅ The correct answer is option C.

2426. The M.I. of hollow circular section about a central axis perpendicular to section as compared to its M.I. about horizontal axis is_________________?

A. same

B. double

C. half

D. four times

✅ The correct answer is option B.

2427. On a ladder resting on smooth ground and leaning against vertical wall, the force of friction will be__________________?

A. towards the wall at its upper end

B. away from the wall at its upper end

C. upwards at its upper end

D. downwards at its upper end

✅ The correct answer is option C.

2428. The maximum frictional force which comes into play when a body just begins to slide over another surface is called_____________________?

A. limiting friction

B. sliding friction

C. rolling friction

D. kinematic friction

✅ The correct answer is option A.

2429. Forces are called coplanar when all of them acting on body lie in________________?

A. one point

B. one plane

C. different planes

D. perpendicular planes

✅ The correct answer is option B.

2430. If n = number of members andy = number of joints, then for a perfect frame, n =_______________?

A. j-2

B.2j-l

C. 2/-3

D.3/-2

✅ The correct answer is option C.